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A bullet with speed 511 m/s and mass m = 5.00 g is shot into a...

A bullet with speed 511 m/s and mass m = 5.00 g is shot into a stationary block of wood hanging a distance h1 = 1.00 m above the ground, as shown in Figure 1. The block is hanging by a string of length r = 0.30 m. The bullet is lodged in the block, and the block-bullet system swings so that the string makes an angle of θ = 60.0° when the string breaks, as shown in Figure 2. The block-bullet system then falls to the ground a horizontal distance d2 = 2.00 m from its position when the string breaks. Ignoring the effects of air resistance, determine the mass, M of the block of wood.
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